Furnace having sectionally supported side walls



Def:- 5, 1933- A. G. BILDSTEIN 1,937,623

FURNACE HAVING SECTIONALLY SUPPORTED SIDE WALLS Filed July 2l. 1931 INVENTOR Wfw q 'f ATToRNEY5 Patented Dec. 5, 1933 PIA-TENT oFF FURNACE n A v1 N G sEo'rIoNALLY sUr- B01111111) sIDnWnLLs Alfred G. Bildstein, Brooklyn, N. Y., assignor to American Archk Company, `New York, N. Y., `a

corporation of Delaware Application July 2:1, 1931. sensing. 552,189 f 4 Claims. (o1. 12s-'6) Making referencerst to. Figure 1, itl Will be 'This invention relates to furnaces having sectionally supported'side walls. v 1

In general, the present invention has in View improving combustion as well as steaming or heat yabsorbing conditions.v y n More specifically, it is an object of this invention to provide a sturdy and yet easily erected o r installed sectionally supported furnace side wall in which wall protecting or heat absorbing water tubes are disposed in the vicinity of the fuel burning means of the furnace. K k f Further objects of this invention will be more apparent if it be borne in mind that in vmany furnace installations (for example, in an installation of the stoker or grate type) the fuel burning means extends adjacent at least two substantially independently supported sections of the furnace wall and, in many instances, adjacent to as many j as six wall sections. In constructions of this general type which have been contemplated heretofore, (i. e., where tubes were disposed closely adjacent a wall in the vicinity of the fuel burning means) the support for the wall bricks has been Very seriously complicated, the complication resulting, at least'in largepart, from the necessity of using different types of mounting structures for the wall bricks.y

in areas remote from and adjacent to theV area or region in which the cooling tubesv are disposed.

With the foregoing in mind, the present invention makes provision for the use of vuniform supporting means for a pluralityof superimposed side wall sections, each substantially independently supported, the wall vstructure as a whole being arranged in such manner as to neatly cooperate with cooling tubes which .may be extended adjacent to a plurality of wall sections at substantially any desired angle. According to this invention, wall structures of the type referred to (including cooling elements extended adjacent thereto) may be built up and supported in sections in such manner that the application of the cooling tubes does `not interfere with proper expansion and'contraction of the individual blocks as well j" as of the sections as units under the influence of changes inV temperature.

` The foregoing more or less lgeneral objects and advantages, as well as others-which will occur to those skilled in the art,1will become more apparent from a consideration of the following description making reference to the accompanying drawing, in which Figure 1 is a somewhat diagrammatic vertical sectional view through a furnace construction embodying various features of the invention, certain -portions or parts being broken away in order to disclose otherslying therebehind; and Figure 2 is a vertical .sectional view taken substantially as indicated by the section line 2 -2 on Figure 1. l

seen that the Afurnace here Ashown includes a Stoker structure fragmentarily indicated at 3, the same beingV extended adjacent to one. of the side walls ata substantial angle with respect to the horizontal, so that the grate surface cornes adjacent to or passes across a lplurality of substantially independently VsupportedY sectionsfof the Wall. Figure 1 alsoincludes a fragmentary showing yat 3a of fuel hopper and feed mechanism. Since this structure may take any desired andwell known form, it is not shown in` detail While I have illustrated the application, rin accordance with the present invention, of a plurality of water circulating elements to the furnace side Wall adjacent a specific-type of stoker structure, it should be .understoodat this point that where theffuel burning means takes some4 other form, it may-be desirable toalterthedisposition or extension of thecooling tubes. The `rinvention is also adaptable to such other furnace `installatODS, as willbe more apparent as this description proceeds.

In Figures 1 andZ IY have shown a bank or row of water coolingl tubes 4 which are extended in a somewhat elongated area paralleling the Stoker` structure 3. In the preferred arrangement, the overall or-total tube area is disposed in such manner that the major portion lthereof is extended above the upper surface of the stoker.

Before proceeding with a discussion of the manner in which these tubes are disposed in combination with theiindependent wall sections, attention Y is called to the construction ofthe sections themselves.

es i

As seen most clearly in Figure they furnace y,

side walls maybe supported as by means,y of vertical columns which vcarry a plurality of ho'rizontally extendingand verticallyrspaced supporting members 6, in this instance of channelform. The members 6, in turn, serve to support the hanger devices 7 such hanger devices being multiplied horizontally along each one of thechannels 6 to form superimposed series thereof.` AThe hanger devices of one series, furthermore', arel y supported or positioned laterally by engagement with abutments 9 of subjacent hangers.

f If desired, an outer wall o1" sheathing 10 may be provided and supported, at lea'stviny part, by means of the horizontal supports 6.-

The inner or sectionally supported wall structure is composed of av plurality of bricks or blocks 1l, each havingV outwardly projecting portions which are adapted to be received in sockets 12 former at the lower ends vof the individual hangers. As here shown, the sockets 12 are formed to be disposed entirely outside of' the general plane ofthe outer surface of the wall, but `it should be observed that thisv structure' forms no part of the present invention per yse,zsince it is describedland-claimed in the copending application of Philip W. Antil, Serial No. 547,047, filed June 26, 1931, assigner to the assignee of this application. Each section further includes a plurality of bricks such as those indicated at 13 kor 13a which rest on the supporting lblocks Vvl1.k Expan? sion joints 14'may be providedbetween the adjacent bricks or adjacent .wall sections.'

' Attention is now called to the fact that the Vwall bricks 13a, which are disposed in the vicinity,

of vthe Water tubes 4 are of somewhat smaller depth 'or' thickness than the bricks in the wall sectionsremote from the tubes 4. Inthisway areces's is provided in the `wall sections in which the'cooling tubes are vat least partially received, so that the inner surface of the wall, considered vas a whole, does not have any tubes or the like projecting inwardly therefrom. It might hereV be noted thatthis arrangement is of advantage since it'r'educes complication in the installation.k of fuel burning 'means such as thestoker indicated by the reference numeral 3 inv-Figure l.

It should-also be observed, 'at this point, that the various wall bricksland 13ctneed differ from eachother onlyin the vmatter'bf thickness or depth, the structure thereof preferably being entirely similar as between the two typesfwith this 'one exception. In this way, the support of theV Various bricks throughout the entire wall vstructure is greatly simplified, since only oneftype of supporting-block as well as hanger cr'suspension devices -need' loe-employed throughout. The

'foregoing arrangement, thereforefaifordsmaximum convenience 'and simplicity in the matters offconstruction,erection and theV carrying of repair partslas will be'appare'ntv to those skilled in the art. v

In addition to the foregoing I preferably "dis--Y pose va lining or veneerof relatively highly re-rv fractory 'blocks or bricks between thesectionally supported wall bricks themselves 'and the cooling tubes. 'Such veneerbricksmay include any suitablehighly refractory material such', for. example,

as carborundurn, silicon carbide, highalumina, ory

compounds thereof. g

In thepreferredarrangement, and as shown in the drawing, the veneer bricks take the form of square-or"oblongbloc1: 15r each having grooves formed tat Aopposite -Aand vparallel"edges thereof,

` When these bricks are built up as indicated, for v example Iiriliigure 12, the grooves cooperate with eachother Ato form longitudinally extended and v rounded cavitiesinwhich the 4tubes f 4 are seated.

lI'hisA-structure,l therefore, provides `for 'the positioning=ofthe blocks l5 byengagem'ent with the tubes 4, so .that the disposition of theveneer between'the tubes and the'blocks'of the Wallsections doesnot .interferewith proper expansion and'contraction ofthe wall bricks under the influence of temperature changes. In other Words, the veneer bricks -15 :have freedom.y for expansion and contraction, in various different directions independently yoi Aexpansion and-contraction of the wall sections as units or oi 'the individual 'blocks of -which such sections Vare built up. .At the same time, these bricks 15 tend to maintain the proper Y across Aor dat least within .being received', at least partially, Within 'said re- 15 composed of refractory materialv having substantially the samefheat resisting characteristics as the remainder of the wall structure. The wall section blocks may, of course, be formed of any ofthe suitable and Well known 'irer clays, in accordance with commonly accepted practice. Y Where relatively high temperatures are contemplated, and also in any other installations in whichV slag or clinker formation may be troublesome, I prefer to use relatively highly refractory Ymaterial as a veneervbetween the water tubes and the main bodyl of the wall.

This use reduces 'clinker adherence'to the wall blocks and yet does not unduly increase the total cost of the installation, since the highly refractory material is'a'ppliedpreferably Vonly in the -form'of athinlayer in the zone of highest temperature or in the region inwhich clinker adherence has heretofore been most troublesome.y

Thus by the combination of cooling'tubesfwith a highly refractorylining Wall in the regionof high temperature, Iam enabled to materially irnproveconibustion conditions generally, aswell as to reduce-di nculties heretoforeencounter-ed as a resultof clinker adherence. `These advantages, it is especially noted,'areobtained,fin accordance with the present invention, in a 'wall structure which is built up in substantially independently .l

supported sections, in spite of the Afact. that the high temperature regionor zone' maybe' extended a Yplurality f v"sup'erjacent sections. In addition to the improvements resulting -rojfn reduction of clink'er adherencavcocling fof 'the walls and theflike, vthe structure ycf the present inventionprovides ifor improved-steaming conu ditions,.as'the coolingitubes 4 may rlea'dilylbecon- Y Ynectedinto the circulationofzany suitable boiler.

withwhichthe furnace'proper isassoc'iated. .Inconclusion .it should be observed that the structure of. thisinvention providesV for the dis- `position oi wall cooling andiheatabsorbingl tubes,

in a high temperature region,'the.said'tubes and their immediately :associated .highly .refractory bricks being arrangedtoneatly cooperate with a wall structure 'of the sectionally supported :type Without complicating Ythe supporting elements themselves and Awithout -interfering *with independent expansion and contraction :of :the main body of the wall sections as'welllasfofthehighly refractory bricks themselves. Aswill alsobeiapparent, the V'foregoing advantages are obtained without Vunduly complicating the brick or block shapes,itbeing noted that'the wall'structuremay be made up of bricks of substantiallynni'form shape and characteristics throughout the entire wallarea with theexception of a meredifference in thickness orv depth ofthe blocksin .one area vas compared with anothen What I claim ist- Y y 1. A furnace including a v'sectionally supported side wall, fuel burningmeans in the furnace' adjacent said wall, vand `water tubes extended along the wall adjacent to the'burningmeans said Wall being composed of vrefractory vbricks someof which, radjacent said burning meansfare of'smaller depth than bricks` in'other Vvi'rallareas to provide a recessin the wall', rand the 'saidrtubes cess, thesaidsmaller depth bricks and ibricks in other Wall' areas being Yof substantially uniform construction, with Vthe exceptionof diiference'inv thickness, 'to provide `for uniform Wall bricksup- Vport inareas'adjacent'to as Vwellas remoteffrom 1 said burning means. l f

2. For a' furnace having a grate therein extended at an angle to the horizontal, a wall structure adjacent one side of said grate, said structure including outer supporting means, an inner refractory wall supported by said means in horizontally extending and vertically superimposed sections, each of said sections being composed of a plurality of bricks and having supporting means therefor providing for expansion and contraction of the bricks in each section independently of those in an adjacent section, said sections further being of such vertical dimension as compared with the extension and angularity of the grate that the grate lies adjacent to bricks of a plurality of said sections, the bricks of said plurality of sections in an elongated zone of the Wall above and substantially paralleling the grate being of smaller depth than bricks of the sections in other portions of the wall, and metal'- lic heat absorbing tubes lying closely adjacent said bricks of smaller depth, said tubes being disposed at least in large part `outwardly of the inner surface of the aforesaid other portions of the Wall.V

3. For a furnace having agrate therein extended at an angle to the horizontal, a wall structure adjacent one side of said grate, said structure including outer supporting means, an inner refractory wall supported by said means in horizontally extending and vertically superimposed sections, each of said sections being composed of a plurality of bricks and having supporting means therefor providing for expansion and contraction of the bricks in each section independently of those in an adjacent section, said sections further being of such vertical dimension as compared with the extension and angularity of the grate that the grate lies adjacent to bricks of a plurality of said sections, the bricks of Asaid plurality of sections in an elongated zone of the wall above and substantially paralleling the grate being of smaller depth than bricks of the sections in other'portions of the wall, metallic heat absorbing tubes lying closely adjacent said bricks of smaller depth, said tubes being disposed at least in large part outwardly of the inner surface of the aforesaid other portions of the wall, and additional refractory bricks lying between said tubes and the wall bricks of smaller depth, said additional bricks being grooved to fit said tubes, whereby said additional bricks serve to space said tubes and whereby the tubes serve to position the said additional bricks even during expansion and contraction of the bricks of the several wall sec-v tions. Y

4. For a furnace, a sectionally supported side Wall, fuel burning means in the furnace adjacent said WalL'andr water tubes extended along the Wall adjacent to the burning means, said wall being composed of vrefractory bricks some of which, adjacent said burning means, are of smaller depth than bricks in other wall areas to provide a Arecess in the wall, and the said tubes being received, at least partially, within said recess, and substantially uniform'wall section supportingrmembers disposed externally of the wall in areas adjacentv to the fuel burning means and in other wall areas,

the said smaller depth bricks and bricks ,in other wall areas being of substantially uniform conf struction,v with the exception' of difference in thickness, and having substantially uniform support engaging parts, whereby to provide for uni-Y form wall brick support in areas adjacentl to as Well as remote 'from saidburning means.

ALFRED G. BILDs'rEIN. n' 

